Angle-iron notcher



Patented Mu, 31,1925.

vUNITan.-.s'lfaras *PATENr OFFICE.

JOHN JENSEN, OF nocxronn, ILLINOIS, vAssIcfNoR To WHITNEY METAL rIOOL'OOM- PVANY, or ROOKFORD, ILLINOIS, a CORPORATION O F ILLINOIS.

ANGLE-IRON NOTOIIER.

V.Application't11ed`Apri1`21, (1924,* Serial No..'07,85`5.

To'aZl whomlit 'may concem: i Y Y Be it known thatI, JOHN JENSEN, aiciti e zen of the `United States, residing at, Rockford, in theA county OfVVinnebago and' State 5 of Illinois, have invented a certainnew and useful Angle-IronjNotcher, of which the A following is a specification.v

rlhe invention relates to a means Vfor Vforming .V-shaped'l notches in one wall or whereby elfectually to form notches of they character indicated.

`Machines heretofore employed for this purpose have not given satisfactory performance for 'the reason that the desired Y "relative positions of', the.v work andV the f punching Or notching tool have not been properlyv maintained. This is due to the factthatin ythe manufacture of angle irons there is necessarilyT formed at the apex of the inner angle a fillet whichin the ynotching operation induces or promotes ak tendency in the cutting tool, riding upon the fillet', to movevaway from the vertical wallor legof the angle. The result is that the apexof the notch when formed is spaced outwardly from the 'inner face of the vertical wall .of ythe angle, and it becomes diiicult, if not impossible, Vrto produce aclean Isharp bend in thebar. 7 f y It isaspecial object of my invention to providey afconstruction which 'insures that the 'proper relationship `between the work and the` cutting'or punchingftool'shall be maintained notwithstanding thetendency of the fillet in the angle to disturb this relaltionship. i f- Figure 1 Of'thejdrawings is a fragmentary perspective-view of yan anglev yiron notcher constructed viny accordance i with .my invention. Y 1 s v' f Fig.` 2 is al fragmetaryfcentralvertical sectional view. through the machine.

Fig. 3 is a horizontalfsection taken-.ap-f proximatelyin the plane of .lineB--B of Fig.v 4 isl a lperspective view of an angle iron bar illustrating the'manner in which the kbar is notched to the proper depth.

. The machine comprises a base 7 having a struction in detail.

plurality of lugsl 8 whereby it may be rigidly secured in'position upon a suitable sup` port. Seated centrally'of the base I provide la die block 9 having a triangularly shaped Opening 10 therein with cutting edges 10- and a. rear guiding edge 10b for a cutting tool or punch 11 in a manner to be presently described. f i

Rising from thel rear edge ofthe base is abracket 12 reinforced vby a web 13 and upon this bracket is carried a head 14:;.in

which is mountedthe operating means for the punch 11, the latter being suitably supportedupon thelower end of a spindle 15 forming partV of such Operating means. Inasmuchas any suitable form of means may be employed for operating the punch I have deemed it unnecessary to illustrate the con- Sulice it to say that the Vspindle has in thel present instance a helical groove therein with which, and a similar groove providedfin the head, aseries of bearing balls coact in the Operation of a lever 16 on the spindle to raise and lower .the punchA 11. .l

The bracket 12 extends forwardly to a point near the forward edge of the base 7 and to resist upward strain upon the bracket incident to the punching operation', its'forward edge is in the present instance secured to the base by means of a pair of Oppositeside members 17.

The punch` 11 is in the form of ak triangular head providing upwardly Vand rearwardly inclined cutting edges 11a adapted to coact with the cutting edges 10a in the die block. At its rear edge the cutting head 11 has integraltherewith a depending guide member 113 adapted to coact with the guiding edge 10b of the die block. Below` the die block theY b ase has an Opening 18 into `which the guideY member 11?J may project and through which the punched-Out portions of the work may pass. Y

The work .A as willvbe understood, is po-y sitioned on the base 7 with the leg or wall to. be notched placed over the die block 10 and'beneath thecutter head 11, and with the' Vother leg or wall -of the angle positioned forin the form of a block or bar interposed between the members 17 at the Vforward edge of the base and held down upon the base by pins 2O carried by said members 17. At its forward edge the bar has a downwardly extending portion or lug 2l in which is journaled a screw 22 which is screw-threaded into the base, being suitablyA held against longitudinal movement in said lug. The screw it will be observed constitutes an adjusting means for varying the position of the stop to accommodate varying sizes of work.

Referring now to Fig.4 2 it will be seen that the guide member 11" is of such length that it engages with the guiding edge 10b of the die block substantially before the cutting operation commences, and with the work firmly held against forward movement, that is to say, in a direction away from the cutting tool by the stop 19, this depending guide member llc serves to maintain the work and the cutting tool in proper relation notwithstanding the tendency of the fillet (shown at a) to disturb this relationship.V

Ihave thus produced a notching means for angle 'iron bars which is capable of easy and rapid operation to effectually perform the work for which it is intended and which from a structural aspect is of a very rugged character.

I claim as my invention:

l. A means for l'orming mitre notches in angleironbars comprising, in combination, a'base, a head supported above the base, a punching tool depending from said head and mounted for up and down movement, said base having an opening therein below said tool and a die block over said opening providing cutting edges adapted to coact with the cutting edges of the tool and also a guiding edge, said tool having a depending portion adapted to engage with said guiding edge, and means for holding work positioned between the tool and the die block against movement in a direction away trom the tool, the arrangement being such that said guide memberengages with itscoacting edge in the die block substantially before the beginning of the cutting' operation.

2. An angle iron notcher comprising, in combination, a base having a die block seated therein, a cutting or punching tool angular in form adapted to coact with the die block to produce a V-'shaped notch in one wall of the angle V iron bar interposed therebetween, means for holding said barv against movement in a direction away from the cutting tool, andv means coacting with the base and operable `to hold the cutting tool against movement in the opposite direction.

3. An angle iron notcher comprising, in combination, a base having an aperture therein, means for supporting above the base a cutting tool adapted for movement throughV the aperture in the base, means Jfor holding an angle iron bar against movement on the base in a direction away from the tool, and guiding means acting between the tool and the base and operable to resist movement of the tool in the opposite direction.

4. The combination of a base having an opening therein, a bracket risin from the rear edge ot the base, a head carried by said bracket, a punching tool, a tool-carrying spindle mounted in the head and operable to raise and lower the tool, said tool being adapted to cut a notch in a piece of work interposed between it and the base, a pair of straps connectino the forward edge of the base with said hea and means for holding the piece of work against movement away from the cutting tool comprising a bar resting upon the inner forward edge'thereof, and means carried by said straps for guiding said bar.

5. The combination in a tool of the character described of a base, a stop against which the outer face of the upright wall or leg ot an angle iron bar is adapted to engage, and cutting` meansfor forming a V-shaped notch in the other wall or leg of said bar while held by the stop, said stop being adjustable in the base toward and from ths cutting means.

6. The combination in a tool of the character described of a base', aV stop against which the outer face of the upright wall or leg of an angle iron bar is adapted to engage, cutting means for forming a V-shaped notch in the other wall or leg of said bar while held by the stop, said stop being adjustable in the base toward and from the cutting means, and a guide member associated with the cutting means operable to hold the tool against movement in a direction away from said stop.

7 A, means for cutting V-shaped or mitre notchesin an angle iron bar having means 'for supporting'the work including a stop member and cutting means comprising a tool angular in form and positioned with its apex adjacent said stop, the arrangement being such that an angle iron bar to be cut is positioned with its horizontal wall or leg beneath the tool and with its vertical leg held by said stop against the apex of the tool, anda member depending from the tool and coacting with the base prior to the commencement of the cutting operation so as to hold the tool against movement in a direction away from` the stop.

In testimony whereof, I have hereunto aiiXed my signature.

JOHN JENSEN. 

